Significance and Function of Galvanizing Process on U-shaped Bolt Surface
As one of the most commonly used fasteners, U-shaped bolts require long-term protection and maintenance during their use due to the importance of their effects. One of the most important ways to protect and maintain is to do anti-oxidation treatment on U-shaped bolts. That is what we usually call anti-rust treatment. One of the most effective methods is galvanizing. Zinc plating refers to the surface treatment skills of plating a layer of zinc on the surface of metals, alloys or other materials for beautiful, anti-rust and other effects. The main method used is hot-dip galvanizing.
The national standard for hot-dip galvanizing is GB/T 13912-2002 "Technical Requirements and Test Methods for Hot-dip Galvanizing of Metal Covered Steel Parts". The future metal of galvanizing should be lubricated in appearance, free of zinc tumors, burrs, and silver. White; the thickness is controllable, and the thickness is selected within 5-107μm; there is no hydrogen embrittlement or temperature hazard on the surface, and the mechanical properties of the material can be guaranteed to be unchanged; it can replace the part of the hot-dip galvanizing process; the resistance of the metal in the future Good corrosiveness, neutral salt spray test up to 240 hours. Galvanization has a wide range of applications, such as steel nails, iron nails, fasteners, various hardware pipe fittings, scaffolding fasteners and so on.
Analysis of the rod structure of U-bolt
The rod structure of the bolt refers to the non-threaded polished rod part, which is classified according to its diameter, mainly including large diameter rods, medium diameter rods, stepped rods and enlarged rods. Large diameter rods are also called standard rods. Their nominal diameter is equal to the nominal diameter of the thread. There are two types of diameter service, one is loose service, mainly used for tensile bolts, such as h12, h14; the other is tight It is mainly used for shear-resistant bolts, such as f9, f7, and f6; pitch rods are also called thin rods, whose nominal diameter is approximately equal to the middle longitude of the thread, and their service belt is h12, or no special rules are required. Used for tensile bolts; stepped rods are also called waisted rods. The rod diameter is less than or equivalent to the minor diameter of the thread. It is mainly used for bolts that require reduced stiffness or bolts that require reduced thread stress concentration; enlarged rods Also called a reinforcing rod, its rod diameter is larger than the larger diameter of the thread, can form an interference fit with the mounting hole, and can also be used for structural repair.